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Author/s Date of

Publishing

Provenance Name of Journal Methodology Results Notes and Questions

Kowalewski,

T.

Blonski, S.

2009

TomaszKowalewski:

-Professor in Polish

Academy of Sciences-verified by Google

Scholar, cited morethan 1800 times

Slawomir Blonski:

-Visiting Associate

Research Engineer inCMNS-Earth System

Science

InterdisciplinaryCenter

Turbulence in Micro-

channels

Fluid: Pure Water

Channel Materials:o Glass for short

channel turbulence

o Polycarbonate for

corrugated wall

Geometry: assumed to beRectangular channel

since the givendimensions are in length,

width, and depth(with

triangular contraption for

short channel turbulence,

with grooves for

corrugated wall)

Apparatus for analysis:

o Microscope, laserlight scope, and

digital camera

ANSYSwas also used fornumerical simulation of

the flow

Short ChannelTurbulence:

Even if the velocity

rapidly increasestowards the entrance

of the gap, the flow stillindicates laminar

behavior, even athigher flow rates.

However, there was a

slight flowdestabilization that

occurred behind the

gap which indicatesthat the transition from

laminar to turbulent

flow regime might

occur there. Theresults from the

simulation and the

actual were near with

each other. Translating

the results into graphs,it shows that at high

Reynolds number, the

flow still seems to be

laminar.

Corrugated Wall:

Almost the same asthat of short channelturbulence, however,

flow destabilization

starts smooth as the

flow rate increases and

the flow pattern shows

transversal velocityfluctuations.

Yao, J.

Yao, Y.F.Patel, M.K.

Mason, P.J.

2007

Yufeng Yao:

-BENG, MSc, PhD,

FRAeS, AFAIAA,

MASME

On Reynolds Number

and Scaling Effects in

Microchannel Flows

Note that this is a

simulation research doneon PHOENICS v3.4

Fluid: Water

Firstly, the model used

for defining the Nusselt

number agrees with

the results from the

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Technology

(Technion)

-cited more than 400

times

-published 24 articles

number.

The behavior ofmicrochannel

flow is the same

as that of a macro-scale flow up to a

hydraulic

diameter of 50m.

The transitionfrom laminar toturbulent flow

occur between

1800 and 2200 in

microchannels

with relative

roughness of

0.32% to 7%.

Velocity

fluctuations may

not testify to

change fromlaminar to

turbulent flow.